2003 is removed
Mistakes in puzzles
lidraughts.org/training/1189
31-27 is also winning by force.
scan gives +4.5 at depth 32, with best response being 20-24
Puzzle 209: after the combination, black has a counter action that seems like a draw to me. Thanks for all the great puzzles! :)
Hello all,
Thank you @jeffreyq2 and @theKneir, both are indeed not correct. Funny how 209 has been out there for so long without anyone else noticing black has an interesting way to make a draw. 209 and 1189 will be bisabled.
Keep enjoying the puzzles. A lot more will be added, almost 3600 now. I like to share with you one of the newest: lidraughts.org/training/3579
lidraughts.org/training/russian/27
the final position is not winning, its a draw
There are tactics where the point is to win, and there are tactics where the point is not to lose @playdraughts
In puzzle 27 the solution is the only way to draw, everything else loses
for lidraughts.org/training/russian/23 what is the followup after 2. 22x13?
@jeffreyq2
{in alphanumeric notation}
2. .. c3:a5 3. e5-f6 e7-d6 (forced, otherwise it is lost due to material deficiency or huge positional disadvantage: normally, in Russian puzzles that option is not questioned) 4. d4-e5 (restricting mobility of black checkers) a5-b4 5. e3-d4 c5:e3 6. f4:d2 d6:f4 7. a7:a3 f4-g3 8. e7-d8 : of course, black can crown a checker after a sacrifice of two checkers with g3-f2 9. g1:g5 c7-d6 (at least saving one checker) 10. g5-h6 h2-g1 11. h5-g7, but the price is too high. White material advantage is more than sufficient for winning: black checker d6 is hanging, white checker h6 will be crowned, by cooperation of two kings black king will be chased from diagonal g1<->a7, opening a crowning path for a3, b2, c3.
Puzzle 3278. After making a king black has the opportunity to play 30-34. Then the only (and a very nice!) win is to put your king on square 30. 31-36 is a very boring variation ;-)
Very nice @MichelStempher !! 😃 Your suggested line is way more interesting and beautiful. You convinced me to change this puzzle (add it again after disabling this one)